JP3660287B2 - Map data distribution device, map data reception device, map data distribution method, and map data reception method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication type vector map distribution method and a map distribution system.
[0002]
[Prior art]
In the conventional information providing system described in Japanese Patent Laid-Open No. 2000-258172, in order to implement the map providing service from the server more efficiently and at a low price, a route calculation unit on the server obtains a route to the destination. The map display position determination unit determines a point where guide route information including map data is to be downloaded, and the thinning determination unit thins out information to be transmitted based on the terminal information. At this time, in order to determine the information to be thinned out, a priority definition table that defines the priority of each map element information is used.
[0003]
[Problems to be solved by the invention]
In the above information providing system, in order to determine the information to be thinned out, it is assumed that a route exists in advance, and no consideration is given to the case where no route exists. When the above-described system is applied to a navigation system, a map use scene other than route guidance may be considered, for example, when a destination is confirmed. In such a case, instead of displaying the map centered on the position where you are, you may display an arbitrary point as the center and then perform operations such as scrolling, enlarging, and reducing. Can not do it.
Further, in the above-described system, since display is not performed unless reception is completed, the waiting time of the user is determined in proportion to the amount of map data. Therefore, in the above-described system, when a map having a large amount of data is provided on a slow communication medium, the user's waiting time becomes very large.
Further, in the above-described system, when priorities are assigned to map elements in order to determine information to be thinned out, only the priority order definition table determined in advance is used. However, when the map is actually displayed, for example, information close to the center of the screen or information close to the route is more likely to be required by the user (higher priority) than information distant from them. However, the above-described system cannot set priority based on such dynamic information.
The present invention has been made in view of these problems, and even when the map data required by the client does not exist, the map data required by the user is dynamically determined and distributed in order. The purpose is to reduce the waiting time of the user without depending on the use scene (whether or not a route is set), the amount of map data, or the like.
Another object of the present invention is to preferentially provide map data that the user needs to a client that cannot hold a large amount of data.
[0004]
[Means for Solving the Problems]
The map data distribution device according to the present invention is:
Map data in which multiple types of data processing units are set, map data that can be processed for each data processing unit is held as possessed map data, and at least part of the retained map data is distributed to the terminal device A distribution device,
An attribute information receiving unit for receiving attribute information of the terminal device from the terminal device;
A data processing unit selection unit that selects a specific data processing unit as a selected data processing unit among the plurality of types of data processing units based on the attribute information;
From the terminal device, a distribution request receiving unit that receives a distribution request for specifying distribution target map data to be distributed among the possessed map data;
A map data extraction unit for extracting the distribution target map data specified by the distribution request from the possessed map data for each of the selected data processing units;
And a map data distribution unit that distributes the distribution target map data extracted by the map data extraction unit for each selected data processing unit to the terminal device for each selected data processing unit. .
[0005]
The attribute information receiving unit receives attribute information indicating the purpose of using the map data of the terminal device from the terminal device,
The data processing unit selection unit selects the selected data processing unit based on the purpose of using the map data of the terminal device indicated in the attribute information.
[0006]
The attribute information receiving unit receives attribute information indicating the performance of the terminal device from the terminal device,
The data processing unit selection unit selects the selected data processing unit based on the performance of the terminal device indicated in the attribute information.
[0007]
The map data distribution device distributes the distribution target map data to a terminal device having a display screen,
The attribute information receiving unit receives attribute information indicating a display size of the display screen of the terminal device from the terminal device,
The data processing unit selection unit selects the selected data processing unit based on the display size indicated in the attribute information.
[0008]
The map data distribution device further includes a priority setting unit that sets a distribution order priority for each selected data processing unit for the distribution target map data extracted for each selected data processing unit. ,
The map data distribution unit distributes the distribution target map data to the terminal device for each selected data processing unit in a distribution order according to the priority of the distribution order set by the priority setting unit. It is characterized by that.
[0009]
The map data distribution device distributes the distribution target map data to a terminal device having a display screen,
The priority setting unit prioritizes the distribution order as the distribution target map data is displayed near the center position of the display screen of the terminal device among the distribution target map data extracted for each selection data processing unit. The degree is set high.
[0010]
The map data distribution device holds map data composed of a plurality of map data components as the possessed map data,
The data processing unit selection unit selects data processing for each map data component as the selected data processing unit,
The map data extraction unit extracts the distribution target map data for each map data component.
[0011]
The map data distribution device holds map data partitioned into a plurality of meshes as the possessed map data,
The data processing unit selection unit selects data processing for each mesh as the selected data processing unit,
The map data extraction unit extracts the distribution target map data for each mesh.
[0012]
The map data distribution device is partitioned into a plurality of meshes, each of which holds map data composed of a plurality of sub-mesh as the possessed map data,
The data processing unit selection unit selects data processing for each sub-mesh as the selected data processing unit,
The map data extraction unit extracts the distribution target map data for each submesh.
[0013]
The map data distribution device is configured by a plurality of map data components, and each map data component is grouped as at least one layer for each common map data component as the possessed map data Holding
The data processing unit selection unit selects data processing for each layer as the selected data processing unit,
The map data extraction unit extracts the distribution target map data for each layer.
[0014]
The delivery request receiving unit receives a delivery request for requesting delivery of at least one specific layer from the terminal device;
The map data extracting unit extracts each of the specific layers.
[0015]
The map data distribution device is configured by a plurality of map data components, and each map data component has map data in which display priority with respect to a scale is set as a drawing level as the possessed map data,
The data processing unit selection unit selects data processing for each drawing level as the selected data processing unit,
The map data extraction unit extracts the distribution target map data for each drawing level.
[0016]
The distribution request receiving unit receives a distribution request for requesting distribution of map data components corresponding to each of the specific drawing levels, wherein at least one specific drawing level is designated from the terminal device.
The map data extraction unit extracts corresponding map data components for each of the specific drawing levels.
[0017]
The map data distribution device holds map data composed of a plurality of map data components as the possessed map data,
The map data distribution device further sets and sets at least one display priority for each of the map data components included in the distribution target map data extracted by the map data extraction unit. A map data selection unit that selects map data components whose total display priority exceeds a predetermined threshold;
The map data distribution unit distributes map data composed of map data components selected by the map data selection unit to the terminal device for each selected data processing unit.
[0018]
The map data distribution device is configured by a plurality of map data components, and holds map data including shape information and attribute information of the shape information in each map data component as the possessed map data,
The map data distribution device further receives attribute information of the shape information from each map data component for each map data component included in the distribution target map data extracted by the map data extraction unit. Has a map data processing section to be removed,
The map data distribution unit distributes distribution target map data, from which the attribute information of the shape information is removed by the map data processing unit, to the terminal device for each selected data processing unit.
[0019]
The map data distribution unit performs data compression processing on the distribution target map data for each selected data processing unit, and distributes the distribution target map data after the data compression processing to the terminal device for each selected data processing unit. Distribution.
[0020]
The map data distribution unit distributes the distribution target map data when a new distribution request transmitted from the terminal device is received by the distribution request reception unit before the distribution target map data is distributed. And the new distribution target map data based on the new distribution request is distributed to the terminal device for each selected data processing unit.
[0021]
The map data receiving device according to the present invention is:
A map data receiving device that receives at least a part of the map data from a map data distribution device that distributes map data in which a plurality of types of data processing units are set and data processing is possible for each data processing unit. ,
Distribution that designates a specific data processing unit among the plurality of types of data processing units as a distribution unit of map data, and specifies distribution target map data to be distributed from the map data distribution device for each distribution unit A target map data designation unit;
A distribution request generating unit that generates a distribution request indicating distribution target map data for each of the distribution units specified by the distribution target map data specifying unit;
The distribution request generated by the distribution request generator is transmitted to the map data distribution device, and the distribution target map data distributed from the map data distribution device for each distribution unit is transmitted for each distribution unit. And a communication unit for receiving.
[0022]
The map data receiving device further has a display screen for displaying map data,
The communication unit receives the distribution target map data for each of the distribution units in an order from a display position closer to a center position of the display screen.
[0023]
The map data receiving device receives at least a part of map data composed of a plurality of map data components from the map data distribution device,
The distribution target map data specifying unit specifies distribution for each map data component as the distribution unit,
The communication unit receives the distribution target map data distributed for each map data component from the map data distribution device for each map data component.
[0024]
The map data receiving device receives at least part of map data partitioned into a plurality of meshes from the map data distribution device,
The distribution target map data specifying unit specifies distribution for each mesh as the distribution unit,
The communication unit receives the distribution target map data distributed for each mesh from the map data distribution device for each mesh.
[0025]
The map data receiving device is divided into a plurality of meshes from the map data distribution device, and each map receives at least a part of map data composed of a plurality of sub-mesh,
The delivery target map data designation unit designates delivery for each submesh as the delivery unit,
The communication unit receives the distribution target map data distributed for each submesh from the map data distribution device for each submesh.
[0026]
The map data receiving device is composed of a plurality of map data components from the map data distribution device, and each map data component is grouped as at least one layer for each common map data component Receive at least part of the data,
The distribution target map data specifying unit specifies distribution for each layer as the distribution unit,
The communication unit receives the distribution target map data distributed for each layer from the map data distribution device, for each layer.
[0027]
The distribution target map data specifying unit specifies at least one specific layer as the distribution target map data,
The distribution request generation unit generates a distribution request for requesting the distribution of the specific layer specified by the distribution target map data specifying unit,
The communication unit transmits the distribution request generated by the distribution request generation unit to the map data distribution device, and determines the specific layer distributed as the distribution target map data from the map data distribution device. The reception is performed for each layer.
[0028]
The map data receiving device is composed of a plurality of map data components from the map data distribution device, and at least a part of the map data in which the display priority for the scale is set as the drawing level in each map data component. Receive
The distribution target map data specifying unit specifies distribution for each drawing level as the distribution unit,
The communication unit receives the distribution target map data distributed for each drawing level from the map data distribution device for each drawing level.
[0029]
The distribution target map data specifying unit specifies at least one specific drawing level as the distribution target map data,
The distribution request generation unit generates a distribution request for requesting distribution of map data components corresponding to each of the specific drawing levels specified by the distribution target map data specifying unit,
The communication unit transmits the distribution request generated by the distribution request generation unit to the map data distribution device, and the specific rendering level distributed as the distribution target map data from the map data distribution device The map data component corresponding to is received for each drawing level.
[0030]
The map data receiving device further includes a map data storage unit for storing the map data distributed from the map data distribution device as stored map data,
The distribution target map data specifying unit specifies map data other than the stored map data stored in the map data storage unit as the distribution target map data.
[0031]
The map data receiving device further includes a display screen for displaying map data;
A display output unit for outputting at least a part of the stored map data stored in the map data storage unit to the display screen before the communication unit receives the distribution target map data; .
[0032]
The map data distribution method according to the present invention includes:
Map data in which multiple types of data processing units are set, map data that can be processed for each data processing unit is held as possessed map data, and at least part of the retained map data is distributed to the terminal device A delivery method,
An attribute information receiving step of receiving attribute information of the terminal device from the terminal device;
A data processing unit selection step of selecting a specific data processing unit as a selected data processing unit among the plurality of types of data processing units based on the attribute information;
From the terminal device, a distribution request receiving step of receiving a distribution request for specifying distribution target map data to be distributed among the possessed map data;
A map data extraction step for extracting the distribution target map data specified by the distribution request from the possessed map data for each of the selected data processing units;
A map data distribution step of distributing the distribution target map data extracted for each selection data processing unit by the map data extraction step to the terminal device for each selection data processing unit. .
[0033]
The map data receiving method according to the present invention includes:
A map data receiving method for receiving at least a part of the map data from a map data distribution device for distributing map data in which a plurality of types of data processing units are set and data processing for each data processing unit is possible. ,
A distribution target map that specifies distribution target map data to be distributed from the map data distribution apparatus and that specifies a specific data processing unit among the plurality of types of data processing units as a distribution unit of the distribution target map data A data specification step;
A distribution request generating step for generating a distribution request indicating the distribution target map data and the distribution unit specified in the distribution target map data specifying step;
The distribution request generated by the distribution request generation step is transmitted to the map data distribution device, and the distribution target map data distributed from the map data distribution device for each distribution unit is transmitted for each distribution unit. Receiving a communication step.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
A map distribution system according to Embodiment 1 will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a map distribution system according to the present embodiment.
In FIG. 1, reference numeral 1 denotes a map distribution device that distributes map data. The map distribution device 1 corresponds to a map data distribution device. The map distribution device 1 is installed on the Internet, an information center, a home, or the like, for example.
Reference numeral 2 denotes a client that receives the map data distributed from the map distribution device 1 and displays the map data to the user. The client 2 corresponds to a terminal device or a map data receiving device. The client 2 is, for example, a mobile phone, a PDA, etc., and is carried by a pedestrian or mounted on a car or a two-wheeled vehicle.
Although omitted in FIG. 1, a wired communication network such as a wireless communication network or the Internet exists between the map distribution device 1 and the client 2.
Examples of the map distribution system shown in FIG. 1 include a communication navigation system (car navigation system, human navigation system), a GIS system, and the like.
[0035]
Next, the internal configuration of the map distribution device 1 and the client 2 will be described.
Regarding the map distribution device 1, reference numeral 11 denotes a map distribution server unit that performs distribution processing of map data.
Reference numeral 12 denotes a map information database (hereinafter referred to as map information DB) that holds map data. The map data held in the map information DB 12 is referred to as held map data.
Reference numeral 13 denotes a Web server unit that performs distribution processing of information other than maps such as menus and POI (Point Of Interest). The Web server unit 13 has CGI and Servlet functions.
Reference numeral 14 denotes a POI database (hereinafter referred to as POI DB) that stores information such as POI.
Reference numeral 15 denotes a menu database for storing menu information (hereinafter referred to as menu DB).
As for the client 2, 21 is a compact map viewer unit that receives map data distributed from the map distribution device 1, and 22 receives information such as POI and menu distributed from the map distribution device 1. It is a browser part.
Map information is exchanged between the map distribution server unit 11 and the compact map viewer unit 21, and information other than maps such as menus and POIs is exchanged between the Web server unit 13 and the browser unit 22. Further, between the Web server unit 13 (CGI or Servlet) on the map distribution device 1 and the map distribution server unit 11 and between the compact map viewer unit 21 and the browser unit 22 on the client 2 as necessary. Exchange of information is performed.
Communication between the map distribution device 1 and the client 2 is performed by HTTP (HTTPS).
[0036]
Moreover, as shown in FIG. 1, the overall flow of map distribution processing using the map distribution system according to the present embodiment is as follows.
(0) When the compact map viewer unit 21 does not exist as an application program on the client 2, it is downloaded through the Web server unit 13 on the map distribution device 1.
(1) Various menus used by the user in the client 2 are all present on the map distribution device 1, and the map distribution device 1 transmits the menu through the Web server unit 13 in response to a request from the client 2. For example, the menu is described in HTML, and communication between the client 2 and the map distribution device 1 is performed by HTTP.
(2) The user determines map data to be displayed by guidance from the menu. The determined map data is transmitted to the map distribution device 1 as a distribution request, and the map distribution device 1 distributes the requested map data through the map distribution server unit 11.
(3) Further, the user determines a condition for selecting the POI information to be displayed by guidance from the menu. For example, “Italian restaurant near current location”. The determined condition is transmitted to the map distribution device 1 as a POI search request. The map distribution device 1 searches for POI information according to the condition by the POI search function of the Web server unit 13 and transmits the result through the Web server unit 13. To do. For example, the POI search function is realized by CGI or the like.
[0037]
Next, the configuration of the map distribution server unit 11 of the map distribution device 1 will be described.
FIG. 2 is a functional block diagram showing the configuration of the map distribution server unit 11.
In FIG. 2, reference numeral 111 denotes a communication unit for exchanging data with a client. As will be described later, the communication unit 111 corresponds to an attribute information receiving unit, a distribution request receiving unit, and a map data distributing unit.
A client management unit 112 holds client information (attribute information) indicating client attributes for each client.
A request control unit 113 analyzes a request from the client 2 and activates processing according to the request. The request control unit 113 selects a specific type of distribution unit (data processing unit) from among a plurality of types of distribution units (data processing units). The request control unit 113 corresponds to a data processing unit selection unit. Here, the distribution unit is a data processing unit at the time of map data extraction and map data distribution, and details will be described later.
Reference numeral 114 denotes a data access unit that extracts map data corresponding to a request from the client 2 from the map information DB 12. The data access unit 114 corresponds to a map data extraction unit.
Reference numeral 115 denotes a data conversion unit for converting map data as necessary. The data conversion unit 115 corresponds to a priority setting unit.
Further, although not shown in FIG. 2, a history collection unit for collecting access history may be added as necessary.
Although not shown, the map distribution apparatus 1 can be realized by a computer having a CPU such as a microprocessor, a recording unit such as a semiconductor memory or a magnetic disk, and a communication unit. In the recording means, a program that realizes the function of each component included in the map distribution device 1 is recorded, and the operation of the map distribution device 1 is controlled by the CPU reading these programs. Function can be realized.
These programs can also be recorded on a recording medium that can be read by a computer. Furthermore, it is also possible to transfer these programs via a communication network.
[0038]
Next, the configuration of the compact map viewer unit 21 of the client 2 will be described with reference to FIG.
In FIG. 3, reference numeral 211 denotes a communication unit that exchanges data with the map distribution device 1.
A data management unit 212 stores map data acquired from the map distribution device 1. The data management unit 212 corresponds to a map data storage unit.
A control unit 213 controls each function in the compact map viewer unit 21. The control unit 213 specifies map data (distribution target map data) distributed from the map distribution device 1, specifies a distribution unit when distributing the distribution target map data, and determines the distribution target map data and the distribution unit. Generate the delivery request shown. Therefore, the control unit 213 corresponds to a distribution target map data designation unit and a distribution request generation unit. Further, the control unit 213 outputs map data and the like to be displayed to the display screen 215. For this reason, it also functions as a display output unit.
Reference numeral 214 denotes an input unit that receives input from the user.
A display screen 215 displays map data and the like to the user.
Reference numeral 216 denotes a position detection unit that detects the current position of the client 2.
[0039]
Next, the configuration of the map data will be described with reference to FIG.
The same type of map data in a certain continuous area is called a map set. The map set is managed in units called meshes divided into fixed sections. That is, the map data is managed in mesh units in the map information DB 12.
Furthermore, when the amount of data per mesh is large, the mesh may be further divided into sub-mesh.
Map data has a concept called a layer. As shown in FIG. 5, groups are formed for each type of map component (map data component) (data indicating main roads, narrow streets, buildings, etc.) to form one layer. Various layers are combined to form one map data.
As described above, a plurality of types of data processing units are set in the map data held by the map distribution device 1, and data processing for each data processing unit is possible.
The data access unit 114 extracts map data from the map information DB 12 for each specific data processing unit among the plurality of types of data processing units, and the communication unit 111 extracts for each specific data processing unit. The mapped map data is distributed for each specific data processing unit. For this reason, a data processing unit becomes a delivery unit at the time of delivery of map data.
The map data distribution unit is as follows.
・ Each map component
・ Each layer of each submesh
・ Each submesh
・ Each layer of each mesh
・ Each mesh
In addition, the mesh size, distribution unit, and the like are stored as configuration information for each map set. Examples of information held as configuration information are as follows.
·version
・ Scale
-Coordinate system type: Latitude / longitude coordinate system, planar rectangular coordinate system, etc.
・ Lower left coordinates
・ Upper right coordinates
・ North / South direction mesh width
・ East-west mesh width
・ Delivery unit
Of the information other than the map, such as POI, information having a position can be displayed with the position superimposed on the map.
[0040]
Next, operations of the map distribution device 1 and the client 2 will be described.
First, the flow of processing when the client 2 is activated will be described with reference to FIG.
(1) The control unit 213 of the client 2 transmits an activation notification together with the client information to the map distribution device 1 through the communication unit 211. Here, the client information is information (attribute information) indicating the attributes of the client 2, and includes the display size of the display screen 215 of the client 2, the memory size (performance), the purpose of use of the map, the communication speed (performance), and the like. Including.
(2) The request control unit 113 of the map distribution device 1 sets a distribution unit based on the client information received through the communication unit 111 and the map configuration information extracted by the data access unit 114.
An example of setting the distribution unit is as follows.
As the client information, the purpose of use of the map, the display size, the memory size, and the communication speed are used.
(2-1) First, it is determined whether or not the distribution unit is “for each layer” depending on the purpose of use of the map. Basically, “Each layer”, but when the overhead of setting the delivery unit “Each layer” is larger, for example, for use purposes where it is necessary to always display all layers. Does not set the distribution unit as “each layer”.
(2-2) Next, the size of the sub-mesh is determined. Specifically, the following a1. And a2. If each expression is satisfied, “each mesh (for each layer)” is set as a distribution unit.
Here, the maximum data size of the delivery unit is the data size of the mesh that maximizes the data size when divided for each mesh, or the data of the layer that maximizes the data size when divided for each layer of each mesh. Means size. A2. In the above formula, n is the number of distribution units to be held by the client 2, and is a constant of 4 or more.
a1. Or a2. When the above equation is not satisfied, b. Division into sub-mesh is performed in a range satisfying the above formula.
a1. : Maximum data size of delivery unit <Communication speed x Target response time
a2. : Maximum data size of delivery unit × n <(client's) memory size
b. : Sub-mesh size when displayed at standard scale> Display size
Note that b. If the sub-mesh cannot be divided so as to satisfy the above condition, “each map component” is set as the distribution unit.
When a target client is assumed, a distribution unit may be set for each type of client in advance.
The distribution unit set in this way is transmitted to the client as a part of the map configuration information and is held for each client by the client management unit 112 of the map distribution device 1.
(3) The control unit 213 of the client 2 manages the map configuration information received through the communication unit 211 by the data management unit 212.
[0041]
Next, the flow of processing when requesting a map will be described with reference to FIG.
(0) The position detection unit 216 of the client 2 periodically passes the current position to the control unit 213.
(1) The control unit 213 of the client 2 receives a map display request from the user through the input unit 214 and issues a map data request to the data management unit 212.
The data management unit 212 returns the information to the control unit 213 when the necessary map data is already held, and that information when it is not held. Thereby, the control part 213 can designate map data other than the map data stored in the data management part 212 among map data required for display as distribution object map data. The control unit 213 designates distribution target map data for each distribution unit. This distribution unit is included in the map configuration information when the client is activated, is transmitted from the map distribution device 1, and is held in the data management unit 212.
When there is map data that is not held by the data management unit 212, the control unit 213 generates a distribution request indicating the distribution target map data for each distribution unit and the latitude / longitude information of the center position of the display screen 215. Then, the generated distribution request is transmitted to the map distribution device 1 through the communication unit 211.
Here, the distribution target map data specifying process in the control unit 213 will be described by taking as an example the case of displaying a new map (when no map data is displayed on the display screen 215).
The relationship between the display area and map data (mesh or submesh) at the time of new map display is, for example, as shown in FIG. A region surrounded by a frame in FIG. 8 is a display region. Here, the map data (mesh / submesh A to F) included in the display area is not held in the data management unit 212 when the new map is displayed. The map distribution apparatus 1 is requested as map data.
[0042]
(2) The request control unit 113 of the map distribution apparatus 1 acquires the client information of the client from the client management unit 112 in accordance with the distribution request received through the communication unit 111, and the distribution target map data from the data access unit 114. To get. At this time, the data access unit 114 extracts the distribution target map data from the map information DB 12 for each distribution unit, and the request control unit 113 acquires the distribution target map data for each distribution unit from the data access unit 114.
Thereafter, the data conversion unit 115 converts the data into a form suitable for the client.
Here, based on the latitude and longitude information of the center position of the display screen acquired when the distribution request is received from the client 2, the data conversion unit 115 sets the priority of the distribution order that is higher in the order of the distribution units closer to the center position. For example, there is a method of setting a higher distribution order priority for distribution units included inside concentric circles with the same interval centered on the latitude and longitude. Note that the interval between concentric circles is determined by client information (display size, etc.).
After the priority of the distribution order is set in this way, the communication unit 111 transmits the distribution target map data to the client 2 for each distribution unit in the order according to the priority of the distribution order.
[0043]
(3) In the client 2, the communication unit 211 receives the distribution target map data for each distribution unit, and the control unit 213 stores the received distribution target map data in the data management unit and outputs it to the display screen 215. And display.
The control unit 213 outputs the distribution target map data to be displayed immediately for each received distribution unit.
[0044]
When displaying map data, depending on the size of the distribution unit and the performance of the client, a problem may occur in processing speed or the screen may flicker. However, in the present embodiment, as described above, the distribution unit is set according to the performance of the client, and thus such a problem does not occur.
[0045]
As described above, the client can receive in order from the map data close to the center of the screen, and further, since the display is performed for each distribution unit, the response to the user can be performed more quickly, and the data in the screen The display can be completed earlier, and as a result, the waiting time of the user when displaying a new map can be shortened.
[0046]
Embodiment 2. FIG.
In the present embodiment, a case where map reduction processing is performed in the client will be described.
The configurations of the map distribution device 1 and the client 2 according to the present embodiment are the same as those of the first embodiment and are shown in FIGS.
The processing at the time of starting the client is the same as that of the first embodiment. In this embodiment, the processing at the time of starting the client is performed, and after the distribution unit is determined, the client 2 sends to the map distribution device 1. A process when transmitting a distribution request will be described.
[0047]
In (1) of the map request process shown in the first embodiment, the control unit 213 of the client 2 determines necessary map data.
For example, the relationship between the display area after map reduction and map data (mesh or submesh) is as shown in FIG. In FIG. 9, a broken-line frame indicates the display area so far, and a solid-line frame indicates a new display area (after map reduction).
Here, among the map data (mesh / sub-mesh A to T) included in the new display area, acquired data (mesh / sub-mesh G, H, I, L, For M, N), the control unit 213 performs output processing and is immediately displayed on the display screen 215.
And the control part 213 requests | requires only the data (except mesh / submesh G, H, I, L, M, N) which the data management part 212 does not hold | maintain to the map delivery apparatus 1 as delivery object map data. become. The distribution target map data is designated for each distribution unit, as in the first embodiment.
The subsequent processing is the same as in the first embodiment.
[0048]
As described above, already received map data is displayed immediately, and map data acquired from the map distribution device can be received in order from the map data close to the center of the screen, so that the response to the user is made earlier. In addition, the display of the data in the screen can be completed earlier, and as a result, the waiting time of the user when the map is reduced can be shortened.
[0049]
Embodiment 3 FIG.
In this embodiment, a case where map scroll processing is performed in the client will be described.
The configurations of the map distribution device 1 and the client 2 according to the present embodiment are the same as those of the first embodiment and are shown in FIGS.
The processing at the time of starting the client is the same as that of the first embodiment. In this embodiment, the processing at the time of starting the client is performed, and after the distribution unit is determined, the client 2 sends to the map distribution device 1. A process when transmitting a distribution request will be described.
[0050]
In (1) of the map request process shown in the first embodiment, the control unit 213 of the client 2 determines necessary map data.
For example, the relationship between the display area after map scrolling and map data (mesh or submesh) is as shown in FIG. In FIG. 10, a broken-line frame indicates a display area so far, and a solid-line frame indicates a new display area (after the map scrolls).
Here, among the map data (mesh / sub-mesh A to I) included in the new display area, the acquired data (mesh / sub-mesh A to F) held in the data management unit 212 is controlled. The unit 213 performs output processing and is immediately displayed on the display screen 215.
And the control part 213 requests | requires only the data (mesh / submesh GI) which the data management part 212 does not hold | maintain to the map delivery apparatus 1 as delivery object map data. The distribution target map data is designated for each distribution unit, as in the first embodiment.
The subsequent processing is the same as in the first embodiment.
[0051]
As described above, already received map data is displayed immediately, and map data acquired from the map distribution device can be received in order from the map data closest to the center of the screen, so the response to the user is made faster. In addition, the display of the data in the screen can be completed earlier, and as a result, the waiting time of the user when scrolling the map can be shortened.
[0052]
Embodiment 4 FIG.
In this embodiment, a case where map rotation processing is performed in the client will be described.
The configurations of the map distribution device 1 and the client 2 according to the present embodiment are the same as those of the first embodiment and are shown in FIGS.
The processing at the time of starting the client is the same as that of the first embodiment. In this embodiment, the processing at the time of starting the client is performed, and after the distribution unit is determined, the client 2 sends to the map distribution device 1. A process when transmitting a distribution request will be described.
[0053]
In (1) of the map request process shown in the first embodiment, the control unit 213 of the client 2 determines necessary map data.
For example, the relationship between the display area after map rotation centered on the center of the screen and map data (mesh or submesh) is as shown in FIG. In FIG. 11, a broken-line frame indicates a display area so far, and a solid-line frame indicates a new display area (after map rotation).
Here, among the map data (mesh / sub-mesh A to L) included in the new display area, acquired data (mesh / sub-mesh C to E, H to J) held in the data management unit 212. The control unit 213 performs output processing and is immediately displayed on the display screen 215.
And the control part 213 requests | requires only the data (except mesh / submesh C-E, HJ) which the data management part 212 does not hold | maintain to the map delivery apparatus 1 as delivery object map data. The distribution target map data is designated for each distribution unit, as in the first embodiment.
The subsequent processing is the same as in the first embodiment.
[0054]
As described above, already received map data is displayed immediately, and map data acquired from the map distribution device can be received in order from the map data closest to the center of the screen, so the response to the user is made faster. In addition, the display of the data in the screen can be completed earlier, and as a result, the waiting time of the user when rotating the map can be shortened.
[0055]
Embodiment 5 FIG.
In the present embodiment, a case where a map pseudo 3D display process is performed in a client will be described.
The map pseudo 3D display is a pseudo 3D display by performing display such that the map is viewed from a diagonally upper viewpoint instead of a normal viewpoint just above the map as shown in FIG.
Furthermore, when a building or the like has height information, it can be displayed in a form closer to 3D by representing the height in a columnar form.
[0056]
The configurations of the map distribution device 1 and the client 2 according to the present embodiment are the same as those of the first embodiment and are shown in FIGS.
The processing at the time of starting the client is the same as that of the first embodiment. In this embodiment, the processing at the time of starting the client is performed, and after the distribution unit is determined, the client 2 sends to the map distribution device 1. A process when transmitting a distribution request will be described.
[0057]
In (1) of the map request process shown in the first embodiment, the control unit 213 of the client 2 determines necessary map data.
For example, the relationship between the display area after the map pseudo 3D display and the map data (mesh or submesh) is as shown in FIG. In FIG. 13, a broken-line frame indicates a display area so far, and a solid-line frame indicates a new display area (after pseudo 3D display).
Here, among the map data (mesh / sub-mesh A to C, E to N) included in the new display area, the acquired data (mesh / sub-mesh F to H, As for J to L), the control unit 213 performs output processing and is immediately displayed on the display screen 215.
And the control part 213 requests | requires only the data (except mesh / submesh FH, JJL) which the data management part 212 does not hold | maintain to the map delivery apparatus 1 as delivery object map data. The distribution target map data is designated for each distribution unit, as in the first embodiment.
The subsequent processing is the same as in the first embodiment.
[0058]
As described above, already received map data is displayed immediately, and map data acquired from the map distribution device can be received in order from the map data closest to the center of the screen, so the response to the user is made faster. In addition, the display of the data in the screen can be completed earlier, and as a result, the waiting time of the user at the time of the map pseudo 3D display can be shortened.
[0059]
Embodiment 6 FIG.
Next, a case where the distribution unit is made more detailed will be described.
In the present embodiment, the map data structure is as follows.
In the map data according to the present embodiment, a drawing level is set for each map component. The drawing level is a display priority with respect to the scale, and a map component with a high drawing level is displayed even when the scale is low, and is not displayed when the scale is reduced when the drawing level is low. For example, the drawing level is set to 1 because the main road is displayed at any scale, and the drawing level is set to 3 because the narrow street is not displayed below the medium scale.
When the same map data is used, the information density decreases when the map is enlarged, and the information density increases when the map is reduced. By setting the drawing level, whether or not to display the component is determined. It can be determined according to the information density.
The correspondence between the drawing level and the scale is held as map configuration information.
[0060]
In the present embodiment, the following is added as a distribution unit of map data.
・ Each drawing level of each layer of each submesh
・ Each drawing level of each submesh
・ Each drawing level of each layer of each mesh
・ For each drawing level of each mesh
Then, in the process (2) at the time of client activation shown in the first embodiment, the request control unit 113 of the map distribution device 1 selects one of the above distribution units based on the client information.
[0061]
Further, when the map data distribution unit is considered in consideration of the drawing level, a specific example of the processing of the client control unit in the processing (1) at the time of the map request shown in the first embodiment is as follows. To do.
Necessary map data is determined by the control unit 213 of the client 2. At this time, a required drawing level can be determined from the displayed scale and map configuration information, and only the map component of the required drawing level is requested to the map distribution apparatus 1 as distribution target map data.
In the process (2) at the time of the map request shown in the first embodiment, the data access unit 114 of the map distribution device 1 selects the map component corresponding to the drawing level indicated in the distribution request for each distribution unit ( Extraction is performed for each drawing level of each layer of each mesh / sub-mesh and each drawing level of each mesh / sub-mesh). Further, the data conversion unit 115 sets the priority of the distribution order higher for the distribution unit closer to the center position based on the latitude and longitude information of the center position of the display screen acquired when the distribution request is received from the client 2, and the communication unit 111. However, the distribution target map data is transmitted to the client 2 for each distribution unit in the order according to the priority of the distribution order.
The configurations of the map distribution device 1 and the client 2 are the same as those shown in the first embodiment, and the operations of the map distribution device 1 and the client 2 are the same as those in the first embodiment except for the processing described above. is there.
[0062]
As described above, the amount of data to be distributed can be reduced even when displaying in a small scale (wide range), so that the response to the user can be performed more quickly and the display of the data in the screen can be performed more quickly. As a result, the same map data can be used in a wide range of scales, and the waiting time of the user when displaying a map in a small scale can be shortened.
[0063]
Embodiment 7 FIG.
Next, a map enlargement process for map data having the data structure shown in the sixth embodiment (map data for which a drawing level is set) will be described.
In the present embodiment, a specific example of the processing of the control unit of the client in (1) of the processing at the time of map request shown in the first embodiment is as follows.
Necessary map data is determined by the control unit 213 of the client 2. Since the display area when the map is enlarged is reduced, newly requested map data is not generated in units such as mesh or submesh. However, when the drawing level is taken into account, depending on the scale to be displayed, map data at a different drawing level is newly required. Here, among the map data determined to be necessary, the acquired data (map component having a high drawing level) held in the data management unit 212 is immediately displayed on the display screen 215. Then, the control unit 213 of the client 2 requests the map distribution device 1 only for the map component at the drawing level that is not held by the data management unit 212 as distribution target map data.
The subsequent processing in the map distribution apparatus 1 is the same as that shown in the sixth embodiment.
[0064]
As described above, already received map data is displayed immediately, and map data acquired from the map distribution device can be received in order from the map data closest to the center of the screen, so the response to the user is made faster. It is possible to complete the display of the data in the screen earlier, and as a result, it is possible to reduce the waiting time of the user when the map is enlarged.
[0065]
Embodiment 8 FIG.
Next, a map reduction process for map data having the data structure shown in Embodiment 6 (map data for which a drawing level is set) will be described.
[0066]
In the present embodiment, a specific example of the processing of the control unit of the client in (1) of the processing at the time of map request shown in the first embodiment is as follows.
Necessary map data is determined by the control unit 213 of the client 2. The display area when the map is reduced is as shown in FIG. For newly requested map data in units such as mesh or sub-mesh, the control unit 213 designates a required drawing level and makes a request to the map distribution apparatus. Note that already acquired data is immediately displayed on the display screen 215 because there is data of a necessary drawing level.
The subsequent processing in the map distribution apparatus 1 is the same as that shown in the sixth embodiment.
[0067]
With the above, already received map data is displayed immediately, and for map data acquired from the map distribution device, only the required drawing level data can be received in order from the map data close to the center of the screen. The response to the user can be made earlier, and the display of the data in the screen can be completed earlier, and as a result, the waiting time of the user when reducing the map can be shortened.
[0068]
Embodiment 9 FIG.
Next, processing during map pseudo 3D display for map data having the data structure shown in Embodiment 6 (map data for which a drawing level is set) will be described.
In the present embodiment, a specific example of the processing of the control unit of the client in (1) of the processing at the time of map request shown in the first embodiment is as follows.
Necessary map data is determined by the control unit 213 of the client 2. The display area at the time of map pseudo 3D display is as shown in FIG. At this time, the scale to be displayed is apparently larger toward the front (lower side in the figure) and smaller toward the rear (upper side in the figure). Thus, for example, the drawing level is displayed as a one-step small scale for the upper ３ region, and the drawing level is displayed as a one-step large scale for the lower ３ region. Appears better.
When such display is performed, for the map data newly requested in units such as mesh or sub-mesh, the control unit 213 specifies the necessary drawing level and requests it to the map distribution apparatus. For data that has already been acquired, only the required drawing level is requested.
The subsequent processing in the map distribution apparatus 1 is the same as that shown in the sixth embodiment.
[0069]
With the above, already received map data is displayed immediately, and for map data acquired from the map distribution device, only the required drawing level data can be received in order from the map data close to the center of the screen. The response to the user can be made earlier, and the display of the data in the screen can be completed more quickly. As a result, the waiting time of the user at the time of the map pseudo 3D display can be shortened. Become.
[0070]
Embodiment 10 FIG.
When distributing map data, some users may want to define a layer to display, such as no need for character data. Therefore, in the present embodiment, a case will be described in which a distribution request is transmitted from the client 2 to the map distribution apparatus 1 by specifying a layer to be displayed in the map distribution system shown in the first embodiment. Assuming that the map data distribution unit takes into account layers, a specific example of processing of the control unit 213 of the client 2 in (1) of the processing flow at the time of map request shown in the first embodiment is as follows: To do.
The control unit 213 of the client 2 issues a distribution request by designating display settings (layers to be displayed) defined in advance by the user.
Then, in the process (2) at the time of the map request shown in the first embodiment, the data access unit 114 of the map distribution device 1 stores the map data corresponding to the display setting (layer to be displayed) indicated in the distribution request. Extract for each delivery unit. Further, the data conversion unit 115 sets the priority of the distribution order higher for the distribution unit closer to the center position based on the latitude and longitude information of the center position of the display screen acquired when the distribution request is received from the client 2, and the communication unit 111. However, the distribution target map data is transmitted to the client 2 for each distribution unit in the order according to the priority of the distribution order.
The configurations of the map distribution device 1 and the client 2 are the same as those shown in the first embodiment, and the operations of the map distribution device 1 and the client 2 are the same as those in the first embodiment except for the processing described above. is there.
[0071]
As described above, since the amount of data to be distributed can be reduced, the response to the user can be performed more quickly, and the display of the data in the screen can be completed more quickly. It becomes possible to shorten the waiting time of the user at the time of display.
[0072]
Embodiment 11 FIG.
In the map distribution system shown in the tenth embodiment, the display setting may be changed in the middle.
For example, when character data in different languages (such as a Japanese character layer and an English character layer) are handled as different layers, the language may be switched halfway.
[0073]
Assuming that the map data distribution unit takes into account layers, a specific example of the processing of the control unit 213 of the client 2 in the processing flow (1) at the time of the map request shown in the first embodiment is as follows. And
The control unit 213 of the client 2 issues a map data request by designating only a layer that is required by changing the display setting (layer to be displayed).
The subsequent processing of the map distribution apparatus 1 is the same as that shown in the tenth embodiment.
[0074]
As described above, since the amount of data to be distributed when the display setting is changed can be reduced, the response to the user can be performed more quickly, and the display of the data in the screen can be completed earlier. As a result, it is possible to reduce the waiting time of the user when changing the display setting.
[0075]
Embodiment 12 FIG.
This Embodiment demonstrates the case where map delivery is performed using a display priority.
The display priority is a value for indicating how much information the user wants to see (how important information is for the user) for each component of the map. The information that the user wants to see varies depending on the purpose of use of the map. Therefore, a display priority setting table is prepared for each purpose of use. For example, if you want to see the route when you are traveling by car and want to see the route, or if you want to see the surroundings to determine the destination when you are walking, .
The purpose of use is transmitted from the client together with the distribution request.
[0076]
Display priority is set for each layer. However, there may be cases where it is desired to set different display priorities even for information belonging to the same layer. For example, when looking at a route, buildings around the route are important, but other buildings are not so important. Therefore, the display priority includes a static display priority that is statically set by the display priority setting table and a dynamic display priority that is dynamically set by the display priority setting function of the data conversion unit 115.
The display priority setting table includes a combination of layers, priority values, and link information to the display priority setting function. It also has the lowest display priority (displays information above that display priority).
For example, the display priority setting table when the destination is determined when moving by car and the route is to be viewed is as follows.
Minimum display priority: 4
・ Main road: 5
・ Narrow street: 3 [※ +1 around the route]
・ Building: 3 [※ +1 around the route and +1 near the intersection]
・ Character: 4
Here, the numerical value set for each component (for example, 5 for the main road and 3 for the narrow street) is the static display priority, and is added to the components around the route (in the narrow street, around the route) +1) is the dynamic display priority. Specifically, in a narrow street around the route, the final display priority is 4 by adding 3 of the static display priority and 1 of the dynamic display priority. Since only the display priority is given, the final display priority is 3.
[0077]
As described above, when map distribution is performed using the display priority, the process of the data conversion unit 115 in the process flow (2) at the time of the map request shown in the first embodiment is as follows. In the present embodiment, the data conversion unit 115 functions as a map data selection unit.
A) Set the display priority.
The data conversion unit 115 sets a static display priority for each layer according to the display priority setting table shown above, for example, for the map data extracted by the data access unit 114, and a display priority setting function. For the layer having the link information to, the dynamic display priority is set for each component by the display priority setting function.
B) Extract distribution data based on display priority.
The data conversion unit 115 extracts only components whose final display priority (static + dynamic) is equal to or greater than the value indicated by the minimum display priority.
C) Set the distribution priority.
Next, as shown in the first embodiment, the data conversion unit 115 sets a high distribution order priority for data arranged near the center of the display screen of the client 2.
[0078]
The communication unit 111 displays the map data set with the distribution priority and the display priority by the data conversion unit 115 in order from the distribution unit with the highest distribution priority, and with the same distribution priority. Send in order from the delivery unit with the highest priority.
The subsequent operation of the client 2 is as described in the first embodiment.
[0079]
As described above, since only the information required by the user is extracted and distributed, the amount of distribution data can be reduced. As a result, a map according to the purpose of use of the user can be provided, and the map can be displayed. It is possible to reduce the waiting time of the user.
[0080]
Embodiment 13 FIG.
In the present embodiment, a case will be described in which map data including various attribute information is converted into a distribution format.
FIG. 14 is a diagram for explaining processing in the present embodiment.
The map format varies depending on the map maker.
Therefore, a converter is provided in the map distribution device 1, and data conversion is performed by the converter (S11), which is converted into an internal processing format (S12). This absorbs the difference in map format.
The map data converted into the internal processing format is stored in the map information DB 12.
In addition, a map component usually has information (shape information) necessary for drawing and various attribute information about the shape information, for example, the distance and the number of lanes in the case of a road.
Therefore, the data conversion unit 115 performs data conversion on the map data extracted from the map information DB 12 by the data access unit 114 (S13), and converts it into a distribution format from which data other than shape information (attribute information) is removed. (S14). Thus, in this embodiment, the data conversion unit 115 functions as a map data processing unit.
And the communication part 111 transmits the map data of the converted format for a delivery to a client for every delivery unit (S15).
On the other hand, the client receives the map data distributed for each distribution unit (S21), and displays the map data in the distribution format as it is (S22, S23).
[0081]
As described above, it is possible to reduce the amount of data to be distributed without depending on the original map format and without losing the characteristics shown in the first embodiment. The waiting time can be further shortened.
[0082]
Embodiment 14 FIG.
In the map distribution system shown in Embodiment 1, the map data may be compressed and decompressed for each distribution unit by the respective communication units of the map distribution device 1 and the client 2. The map data compression and decompression method may be a commonly used method.
[0083]
As described above, it is possible to reduce the amount of data to be distributed without impairing the characteristics shown in the first embodiment, and it is possible to further reduce the waiting time of the user when displaying the map.
[0084]
Embodiment 15 FIG.
In the map distribution system shown in Embodiment 1, the case where a map is continuously requested will be described.
When scrolling is performed immediately after displaying a new map as shown in FIG. 15, a new distribution request may occur even though map data is still being acquired. In this case, there is some data that is not necessary even though the meshes (or sub-mesh) A to C at the left end are not acquired.
FIG. 16 shows the flow of processing when requesting a map in such a case.
First, the request control unit 113 of the map distribution apparatus 1 acquires the information of the client from the client management unit 112 according to the distribution request received through the communication unit 111, acquires the map data from the data access unit 114, After the data conversion unit 115 converts the data into a form suitable for the client, the map information is transmitted to the client through the communication unit.
Here, the transmitted map data is managed by the client management unit 112. Data transmitted at the start of transmission is stored in the client management unit 112, and discarded at the client management unit 112 when transmission is completed.
[0085]
Further, FIG. 17 shows the flow of processing at the time of continuous map request.
The control unit 213 of the client 2 receives a map display request from the user through the input unit 214 and issues a map data request to the data management unit 212. The data management unit 212 returns to the control unit 213 that the map data being acquired is not held. About the map information which the control part 213 does not hold | maintain, the communication request | requirement is transmitted to the map delivery apparatus 1 through the communication part 211 with the latitude longitude of the screen center.
That is, the map data “mesh / sub-mesh D, E, F” in FIG. 15 is requested again, and the map data “mesh / sub-mesh A, B, C” being “acquiring (unnecessary)” is requested. ) Is not required at this time.
[0086]
Next, the request control unit 113 of the map distribution device 1 acquires the client information from the client management unit 112 according to the distribution request received through the communication unit 111. For map data that is not targeted for distribution request, the communication unit 111 interrupts transmission of the data, and the map data being transmitted is acquired from the client management unit 112.
Thereafter, the map data is acquired from the data access unit 114, the data is converted into a form suitable for the client by the data conversion unit 115, and then the map information is transmitted to the client through the communication unit 111.
The transmitted map data is managed by the client management unit 112. Data transmitted at the start of transmission is stored in the client management unit 112, and discarded at the client management unit 112 when transmission is completed.
[0087]
The control unit 213 of the client 2 manages map data received through the communication unit 211 by the data management unit 212 and displays the map data on the display screen 215.
[0088]
As described above, even when the map is continuously requested, the response to the user can be performed more quickly, and the display of the data in the screen can be completed earlier. It is possible to reduce the waiting time of the user.
[0089]
In the above first to fifteenth embodiments, the map data distribution device and the map data receiving device according to the present invention have been described. However, the map data distribution method according to the present invention according to the processing procedure described in the first to fifteenth embodiments. In addition, a map data receiving method can also be realized.
[0090]
Here, the characteristics of the first to fifteenth embodiments are summarized below.
[0091]
The map distribution system of Embodiment 1 is
On the server,
・ Map data divided into distribution units consisting of one or more map components
・ Data conversion means to convert map data
・ Communication means for distributing data to clients
And also to clients,
.Communication means for receiving data distributed from the server
.Map display means for displaying data received by communication means
The server data conversion means
・ For each distribution unit of map data, distribution priority is given in order from the one closest to the center of the client display screen.
And the communication means of the server
・ Distribute in the order of distribution priority given by the data conversion means
And the client's map display means
・ Display received data immediately
By
・ Reduce user waiting time when displaying a new map
It is characterized by that.
[0092]
The map distribution method of Embodiment 2 is as follows:
To the client,
.Control means for generating a request to the server
The client control means
・ Do not request data already distributed
And data conversion means of the server
・ For each distribution unit of map data, distribution priority is given in order from the one closest to the center of the client display screen.
And the client's map display means
・ Display already distributed data before receiving
By
・ Reduce user waiting time when reducing maps
It is characterized by that.
[0093]
The map distribution method of Embodiment 3 is
To the client,
.Control means for generating a request to the server
The client control means
・ Do not request data already distributed
And data conversion means of the server
・ For each distribution unit of map data, distribution priority is given in order from the one that is in the scroll direction and close to the center of the client display screen.
And the client's map display means
・ Display already distributed data before receiving
By
・ Reduce user waiting time when scrolling maps
It is characterized by that.
[0094]
The map distribution method of the fourth embodiment is as follows:
To the client,
.Control means for generating a request to the server
The client control means
・ Do not request data already distributed
And data conversion means of the server
・ For each distribution unit of map data, distribution priority is given in order from the one closest to the center of the client display screen.
And the client's map display means
・ Display already distributed data before receiving
By
・ Reduce user waiting time during map rotation
It is characterized by that.
[0095]
The map distribution method of the fifth embodiment is as follows:
To the client,
.Control means for generating a request to the server
The client control means
・ Do not request data already distributed
And data conversion means of the server
・ For each distribution unit of map data, a higher distribution priority is given in order from the top of the screen and the closest to the center of the client display screen.
And the client's map display means
・ Display already distributed data before receiving
By
・ Reduce user waiting time when displaying 3D map
It is characterized by that.
[0096]
The map distribution method of the sixth embodiment is as follows:
To the client,
.Control means for generating a request to the server
The map data of the server
-The drawing level can be set for each component, and the delivery unit should be based on the drawing level.
And the client control means
Specify the required drawing level
By
・ The same map data can be used in a wide range of scales
・ Reduce user waiting time when displaying maps at a small scale
It is characterized by that.
[0097]
The map distribution system of Embodiment 7 is
Client control means
-Request only the newly required drawing level for already distributed data.
And data conversion means of the server
・ For each distribution unit of map data, distribution priority is given in order from the one closest to the center of the client display screen.
And the client's map display means
・ Display already distributed data before receiving
By
・ Reduce user waiting time when expanding maps
It is characterized by that.
[0098]
The map distribution system of Embodiment 8 is
Client control means
・ Specify the required drawing level for newly requested data
And data conversion means of the server
・ For each distribution unit of map data, distribution priority is given in order from the one closest to the center of the client display screen.
And the client's map display means
・ Display already distributed data before receiving
By
・ Reduce user waiting time when reducing maps
It is characterized by that.
[0099]
The map distribution system of Embodiment 9 is
Client control means
-Request only the newly required drawing level for already distributed data.
・ Specify the required drawing level for newly requested data.
And data conversion means of the server
・ For each distribution unit of map data, a higher distribution priority is given in order from the top of the screen and the closest to the center of the client display screen.
And the client's map display means
・ Display already distributed data before receiving
By
・ Reduce user waiting time when displaying 3D map
It is characterized by that.
[0100]
The map distribution system of the tenth embodiment is
To the client,
.Control means for generating a request to the server
The map data of the server
・ Distribution units are considered in layers
And the client control means
・ Specify the required layer for newly requested data
By
・ Reduce user waiting time when displaying maps
It is characterized by that.
[0101]
The map distribution method of the eleventh embodiment is as follows.
To the client,
.Control means for generating a request to the server
The map data of the server
・ Distribution units are considered in layers
And the client control means
-Requesting only the newly required layer for already distributed data, and the client's map display means
・ Display already distributed data before receiving
By
・ Reduce user waiting time when changing display settings
It is characterized by that.
[0102]
The map distribution method of the twelfth embodiment is as follows:
The server
・ Display priority setting table
・ Display priority setting means
The server data conversion means
-Assign display priority to each component of the map data according to the display priority setting table and display priority setting means.
・ Extract only components with minimum display priority or higher
And the communication means of the server
・ Distribute in the order of distribution priority and display priority given by the data conversion means
By
・ Reduced distribution data volume
And
・ Provide maps according to user's purpose of use
・ Reduce user waiting time when displaying maps
It is characterized by that.
[0103]
The map distribution system of Embodiment 13 is
Server data conversion means
-Remove unnecessary attributes from the map data for drawing on the client
By
・ Reduced distribution data volume
And
・ Reduce user waiting time when displaying maps
It is characterized by that.
[0104]
The map distribution method of the fourteenth embodiment is
The server communication means
・ Compress map data
And the communication means of the client
・ Expand map data
By
・ Reduced distribution data volume
And
・ Reduce user waiting time when displaying maps
It is characterized by that.
[0105]
The map distribution system of the fifteenth embodiment is
Server client management means
・ Manage map data being sent
And the server request control means
・ Suspend transmission if a map request is received during transmission
By
・ Reduce user waiting time for continuous map requests
It is characterized by.
[0106]
【The invention's effect】
The map data distribution device according to the present invention selects a specific data processing unit as a selected data processing unit among a plurality of types of data processing units based on the attribute information of the terminal device, extracts map data for each selected data processing unit, and selects Since map data is distributed for each data processing unit, it is possible to shorten the time to display map data without causing a processing speed problem or flickering on the display screen in the terminal device.
[0107]
Further, the map data distribution device according to the present invention sets the distribution order priority for each selection data processing unit for the distribution target map data, and selects the distribution target map data in the order according to the distribution order priority. Since the distribution is performed for each processing unit, the terminal device can start displaying sequentially from map data having high importance, and the waiting time of the user can be shortened.
[0108]
In addition, the map data distribution device according to the present invention sets a higher priority for the distribution order for map data displayed closer to the center position of the display screen of the terminal device. Display can be started sequentially from the map data displayed near the user, and the waiting time of the user can be shortened.
[0109]
Furthermore, the map data receiving apparatus according to the present invention designates distribution target map data for each distribution unit, makes a distribution request, and sequentially receives distribution map data for each distribution unit from the map data distribution apparatus. The time to display the map data can be reduced without causing any problems or flickering on the display screen.
[0110]
The map data distribution method according to the present invention selects a specific data processing unit as a selected data processing unit from among a plurality of types of data processing units based on the attribute information of the terminal device, and extracts map data for each selected data processing unit. Since the map data is distributed for each selected data processing unit, the time to display the map data can be reduced without causing a processing speed problem or flickering on the display screen in the terminal device.
[0111]
Furthermore, the map data receiving method according to the present invention designates the distribution target map data for each distribution unit, makes a distribution request, and sequentially receives the distribution map data for each distribution unit from the map data distribution apparatus. The time to display the map data can be reduced without causing any problems or flickering on the display screen.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a map distribution system.
FIG. 2 is a diagram showing a configuration of a map distribution device.
FIG. 3 is a diagram showing a configuration of a client.
FIG. 4 is a diagram for explaining a map set, a mesh, and a sub-mesh.
FIG. 5 is a diagram illustrating layers.
FIG. 6 is a diagram showing processing at the time of starting a client.
FIG. 7 is a diagram showing processing at the time of a map request.
FIG. 8 is a diagram showing distribution target map data when a map is newly displayed.
FIG. 9 is a diagram showing distribution target map data at the time of map reduction.
FIG. 10 is a diagram showing distribution target map data at the time of map scrolling.
FIG. 11 is a diagram showing distribution target map data at the time of map rotation.
FIG. 12 is a diagram illustrating map pseudo 3D display.
FIG. 13 is a diagram showing distribution target map data at the time of map pseudo 3D display.
FIG. 14 is a diagram for explaining data conversion to a distribution format.
FIG. 15 is a diagram showing distribution target map data at the time of a continuous map request.
FIG. 16 is a diagram showing processing when a map is continuously requested.
FIG. 17 is a diagram showing processing when a map is continuously requested.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Map delivery apparatus, 2 clients, 11 Map delivery server part, 12 Map information database, 13 Web server part, 14 POI database, 15 Menu database, 21 Compact map viewer part, 22 Browser part, 111 Communication part, 112 Client management part , 113 request control unit, 114 data access unit, 115 data conversion unit, 211 communication unit, 212 data management unit, 213 control unit, 214 input unit, 215 display screen, 216 position detection unit.

Claims (30)

A plurality of types of data processing units are set, map data that can be extracted in accordance with any one of the plurality of types of data processing units is held as possessed map data, and at least a part of the retained map data is stored A map data distribution device for distributing to a terminal device,
An attribute information receiving unit for receiving attribute information of the terminal device from the terminal device;
Based on the attribute information, select the data processing unit is used as the extraction unit of the data extracted from the plurality of types of data processing units, the data processing unit selector for the selected data processing unit and the selected data processing unit ,
From the terminal device, a distribution request receiving unit that receives a distribution request for specifying distribution target map data to be distributed among the possessed map data;
A map data extraction unit for extracting the distribution target map data specified by the distribution request from the possessed map data for each of the selected data processing units;
A map data distribution unit that distributes the distribution target map data extracted for each selected data processing unit by the map data extraction unit to the terminal device for each selected data processing unit; Map data distribution device. The attribute information receiving unit receives attribute information indicating the purpose of using the map data of the terminal device from the terminal device,
The map data distribution device according to claim 1, wherein the data processing unit selection unit selects the selection data processing unit based on a purpose of using the map data of the terminal device indicated in the attribute information. The attribute information receiving unit receives attribute information indicating the performance of the terminal device from the terminal device,
The map data distribution device according to claim 1, wherein the data processing unit selection unit selects the selected data processing unit based on the performance of the terminal device indicated in the attribute information. The map data distribution device distributes the distribution target map data to a terminal device having a display screen,
The attribute information receiving unit receives attribute information indicating a display size of the display screen of the terminal device from the terminal device,
The map data distribution device according to claim 1, wherein the data processing unit selection unit selects the selected data processing unit based on the display size indicated in the attribute information. The map data distribution device further includes a priority setting unit that sets a distribution order priority for each selected data processing unit for the distribution target map data extracted for each selected data processing unit. ,
The map data distribution unit distributes the distribution target map data to the terminal device for each selected data processing unit in a distribution order according to the priority of the distribution order set by the priority setting unit. The map data distribution apparatus according to claim 1, wherein: The map data distribution device distributes the distribution target map data to a terminal device having a display screen,
The priority setting unit prioritizes the distribution order as the distribution target map data is displayed near the center position of the display screen of the terminal device among the distribution target map data extracted for each selection data processing unit. The map data distribution device according to claim 5, wherein the degree is set high. The map data distribution device holds map data composed of a plurality of map data components as the possessed map data,
The data processing unit selection unit selects data processing for each map data component as the selected data processing unit,
The map data distribution device according to claim 1, wherein the map data extraction unit extracts the distribution target map data for each map data component. The map data distribution device holds map data partitioned into a plurality of meshes as the possessed map data,
The data processing unit selection unit selects data processing for each mesh as the selected data processing unit,
The map data distribution device according to claim 1, wherein the map data extraction unit extracts the distribution target map data for each mesh. The map data distribution device is partitioned into a plurality of meshes, each of which holds map data composed of a plurality of sub-mesh as the possessed map data,
The data processing unit selection unit selects data processing for each sub-mesh as the selected data processing unit,
The map data distribution device according to claim 1, wherein the map data extraction unit extracts the distribution target map data for each submesh. The map data distribution device is configured by a plurality of map data components, and each map data component is grouped as at least one layer for each common map data component as the possessed map data Holding
The data processing unit selection unit selects data processing for each layer as the selected data processing unit,
The map data distribution device according to claim 8 or 9, wherein the map data extraction unit extracts the distribution target map data for each layer. The delivery request receiving unit receives a delivery request for requesting delivery of at least one specific layer from the terminal device;
The map data distribution device according to claim 10, wherein the map data extraction unit extracts each of the specific layers. The map data distribution device is configured by a plurality of map data components, and each map data component has map data in which display priority with respect to a scale is set as a drawing level as the possessed map data,
The data processing unit selection unit selects data processing for each drawing level as the selected data processing unit,
The map data distribution device according to claim 8, wherein the map data extraction unit extracts the distribution target map data for each drawing level. The distribution request receiving unit receives a distribution request for requesting distribution of map data components corresponding to each of the specific drawing levels, wherein at least one specific drawing level is designated from the terminal device.
The map data distribution device according to claim 12, wherein the map data extraction unit extracts corresponding map data components for each of the specific drawing levels. The map data distribution device holds map data composed of a plurality of map data components as the possessed map data,
The map data distribution device further sets and sets at least one display priority for each of the map data components included in the distribution target map data extracted by the map data extraction unit. A map data selection unit that selects map data components whose total display priority exceeds a predetermined threshold;
The map data distribution unit distributes map data composed of map data components selected by the map data selection unit to the terminal device for each selected data processing unit. The map data distribution device described in 1. The map data distribution device is configured by a plurality of map data components, and holds map data including shape information and attribute information of the shape information in each map data component as the possessed map data,
The map data distribution device further receives attribute information of the shape information from each map data component for each map data component included in the distribution target map data extracted by the map data extraction unit. Has a map data processing section to be removed,
The map data distribution unit distributes distribution target map data from which attribute information of the shape information is removed by the map data processing unit to the terminal device for each selected data processing unit. 1. The map data distribution device according to 1.   The map data distribution unit performs data compression processing on the distribution target map data for each selected data processing unit, and distributes the distribution target map data after the data compression processing to the terminal device for each selected data processing unit. The map data distribution device according to claim 1, wherein the map data distribution device distributes the map data.   The map data distribution unit distributes the distribution target map data when a new distribution request transmitted from the terminal device is received by the distribution request reception unit before the distribution target map data is distributed. 2. The map data distribution device according to claim 1, wherein the map data distribution device according to claim 1, wherein new distribution target map data based on the new distribution request is distributed to the terminal device for each selected data processing unit. A map data receiving device that receives at least a part of the map data from a map data distribution device that distributes map data in which a plurality of types of data processing units are set and data processing is possible for each data processing unit. ,
Distribution that designates a specific data processing unit among the plurality of types of data processing units as a distribution unit of map data, and specifies distribution target map data to be distributed from the map data distribution device for each distribution unit A target map data designation unit;
A distribution request generating unit that generates a distribution request indicating distribution target map data for each of the distribution units specified by the distribution target map data specifying unit;
The distribution request generated by the distribution request generator is transmitted to the map data distribution device, and the distribution target map data distributed from the map data distribution device for each distribution unit is transmitted for each distribution unit. A map data receiving device comprising a communication unit for receiving. The map data receiving device further has a display screen for displaying map data,
The map data receiving device according to claim 18, wherein the communication unit receives the distribution target map data for each of the distribution units in an order from a display position closer to a center position of the display screen. The map data receiving device receives at least a part of map data composed of a plurality of map data components from the map data distribution device,
The distribution target map data specifying unit specifies distribution for each map data component as the distribution unit,
19. The map data receiving apparatus according to claim 18, wherein the communication unit receives the distribution target map data distributed from the map data distribution apparatus for each map data component, for each map data component. The map data receiving device receives at least part of map data partitioned into a plurality of meshes from the map data distribution device,
The distribution target map data specifying unit specifies distribution for each mesh as the distribution unit,
The map data receiving apparatus according to claim 18, wherein the communication unit receives the distribution target map data distributed for each mesh from the map data distribution apparatus for each mesh. The map data receiving device is divided into a plurality of meshes from the map data distribution device, and each map receives at least a part of map data composed of a plurality of sub-mesh,
The delivery target map data designation unit designates delivery for each submesh as the delivery unit,
The map data receiving apparatus according to claim 18, wherein the communication unit receives the distribution target map data distributed for each submesh from the map data distribution apparatus for each submesh. The map data receiving device is composed of a plurality of map data components from the map data distribution device, and each map data component is grouped as at least one layer for each common map data component Receive at least part of the data,
The distribution target map data specifying unit specifies distribution for each layer as the distribution unit,
The map data receiving device according to claim 21 or 22, wherein the communication unit receives the distribution target map data distributed for each layer from the map data distribution device for each layer. The distribution target map data specifying unit specifies at least one specific layer as the distribution target map data,
The distribution request generation unit generates a distribution request for requesting the distribution of the specific layer specified by the distribution target map data specifying unit,
The communication unit transmits the distribution request generated by the distribution request generation unit to the map data distribution device, and determines the specific layer distributed as the distribution target map data from the map data distribution device. The map data receiving apparatus according to claim 23, wherein the map data receiving apparatus receives each layer. The map data receiving device is composed of a plurality of map data components from the map data distribution device, and at least a part of the map data in which the display priority for the scale is set as the drawing level in each map data component. Receive
The distribution target map data specifying unit specifies distribution for each drawing level as the distribution unit,
25. The map data receiving apparatus according to claim 21, wherein the communication unit receives the distribution target map data distributed from the map data distribution apparatus for each drawing level for each drawing level. . The distribution target map data specifying unit specifies at least one specific drawing level as the distribution target map data,
The distribution request generation unit generates a distribution request for requesting distribution of map data components corresponding to each of the specific drawing levels specified by the distribution target map data specifying unit,
The communication unit transmits the distribution request generated by the distribution request generation unit to the map data distribution device, and the specific rendering level distributed as the distribution target map data from the map data distribution device 26. The map data receiving device according to claim 25, wherein the map data constituent elements corresponding to are received for each drawing level. The map data receiving device further includes a map data storage unit for storing the map data distributed from the map data distribution device as stored map data,
The map data receiving device according to claim 18, wherein the distribution target map data specifying unit specifies map data other than the stored map data stored in the map data storage unit as the distribution target map data. . The map data receiving device further includes a display screen for displaying map data;
A display output unit configured to output at least a part of the stored map data stored in the map data storage unit to the display screen before the communication unit receives the distribution target map data; The map data receiving device according to claim 27. A plurality of types of data processing units are set, map data that can be extracted in accordance with any one of the plurality of types of data processing units is held as possessed map data, and at least a part of the retained map data is stored A map data distribution method for distributing to a terminal device,
An attribute information receiving step of receiving attribute information of the terminal device from the terminal device;
A data processing unit selection step of selecting a data processing unit to be used as an extraction unit in data extraction from the plurality of types of data processing units based on the attribute information, and using the selected data processing unit as a selected data processing unit; ,
From the terminal device, a distribution request receiving step of receiving a distribution request for specifying distribution target map data to be distributed among the possessed map data;
A map data extraction step for extracting the distribution target map data specified by the distribution request from the possessed map data for each of the selected data processing units;
A map data distribution step of distributing the distribution target map data extracted for each selected data processing unit by the map data extracting step to the terminal device for each selected data processing unit. Map data delivery method. A map data receiving method for receiving at least a part of the map data from a map data distribution device for distributing map data in which a plurality of types of data processing units are set and data processing for each data processing unit is possible. ,
A distribution target map that specifies distribution target map data to be distributed from the map data distribution apparatus and that specifies a specific data processing unit among the plurality of types of data processing units as a distribution unit of the distribution target map data A data specification step;
A distribution request generating step for generating a distribution request indicating the distribution target map data and the distribution unit specified in the distribution target map data specifying step;
The distribution request generated in the distribution request generation step is transmitted to the map data distribution device, and the distribution target map data distributed from the map data distribution device for each distribution unit is transmitted for each distribution unit. And a communication step of receiving the map data.

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